package pl.edu.agh.bd2.servlets;

import java.io.IOException;
import java.util.HashSet;

import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import pl.edu.agh.bd2.domain.GradeType;
import pl.edu.agh.bd2.domain.Student;
import pl.edu.agh.bd2.domain.Subject;
import pl.edu.agh.bd2.domain.Teacher;
import pl.edu.agh.bd2.domain.Topic;
import pl.edu.agh.bd2.util.HibernateDAO;

/**
 * Servlet implementation class NewSubjectServlet
 */
@WebServlet("/newSubject.do")
public class NewSubjectServlet extends HttpServlet {
	private static final long serialVersionUID = 1L;
       
    /**
     * @see HttpServlet#HttpServlet()
     */
    public NewSubjectServlet() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		HttpSession session = request.getSession();
		HibernateDAO<Subject> dao = new HibernateDAO<Subject>();
		
		Subject subject = new Subject(request.getParameter("name"), new HashSet<GradeType>(),new HashSet<Student>(), 
				(Teacher)session.getAttribute("teacher"), new HashSet<Topic>());
		
		dao.persist(subject);
		
		HashSet<Subject> subjects = (HashSet<Subject>)session.getAttribute("subjects");
		System.out.println(session.getAttribute("login"));
		subjects.add(subject);
		
		RequestDispatcher view = request.getRequestDispatcher("/subjects.jsp");
		view.forward(request, response);
	}
}
